# Construction

This section defines the construction staging sequence for the Steel Tub Girder Bridge including substructure and superstructure construction.

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**Navigation:** Construction
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## Overview

Construction staging analysis allows modeling of:

* Step-by-step element activation
* Time-dependent effects (creep and shrinkage)
* Load sequence effects
* Structural deformation during construction

Structural elements exist in either a constructed or unconstructed state, and only constructed elements are utilized in structural analysis. Initially, all elements are in an unconstructed state until they are explicitly constructed in a given stage.

## Sections

| Section                                                                                                                                                                                  | Description                                              |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------- |
| [Construction Stage](https://docs.openbrim.org/examples/steel-bridge-examples/example-steel-tub-girder-bridge-ex1-stg/construction-ex1-stg/construction-stage-ex1-stg)                   | Define construction stage sequence                       |
| [Substructure Construction](https://docs.openbrim.org/examples/steel-bridge-examples/example-steel-tub-girder-bridge-ex1-stg/construction-ex1-stg/substructure-construction-ex1-stg)     | Configure pile, foundation, column, and cap construction |
| [Superstructure Construction](https://docs.openbrim.org/examples/steel-bridge-examples/example-steel-tub-girder-bridge-ex1-stg/construction-ex1-stg/superstructure-construction-ex1-stg) | Configure girder, deck, and attachment construction      |

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Complete Construction staging before defining load combinations.
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